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Thermal rectification devices can be important for various thermal managementapplications. For oscillator chains, thermal rectification was observed whenmasses are distributed non-uniformly. Leaning on the importance of topologicalmaterials, we consider here a simple vibrational topological system, the binaryisotope superlattice (BISL). We show that the BISL can be mapped exactly ontothe Su-Schrieffer-Heeger (SSH) model, which has different topological phases,including topological edge sates. For the case, where there is a singletopological edge state, we show that the BISL exhibits thermal rectification inthe presence of a small nonlinear term. Thermal transport is computed usingtemperature reservoirs connected to both extremities. These results haveimplications for other classes of topological phonon systems.

Thermal rectification with topological edge states